@Shin
Shin chúc bạn gì đó học tốt nha
c)$\frac{x-2}{6x²-6x}$-$\frac{1}{4x²-4x}$
=$\frac{4(x-2)}{24x(x-1)}$-$\frac{6}{24x(x-1)}$
=$\frac{4x-14}{24x(x-1)}$
d)$\frac{3}{x+3}$-$\frac{x-6}{x²+3x}$
=$\frac{3x}{x(x+3)}$-$\frac{x-6}{x(x+3)}$
=$\frac{2x-6}{x(x+3)}$
e)$\frac{2}{x+4}$+$\frac{x+20}{x²-16}$
=$\frac{2(x-4)}{(x+4)(x-4)}$-$\frac{x-20}{(x+4)(x-4)}$
=$\frac{3x+12}{(x+4)(x-4)}$
=$\frac{3(x+4)}{(x+4)(x-4)}$
=$\frac{3}{x-4}$
Cho shin hay nhất nhé
